Ok I have solved problem finally! My mistake. I have created void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)Function earlier in my code by using on Timer 2.I have deleted my function and put everything into the new generated callback.Ever...

Hi thanks for article. I am trying to follow your manual step by step; and when I am compiling the project I have next errors:./Core/Src/main.c: At top level:../Core/Src/main.c:1634:6: error: redefinition of 'HAL_TIM_PeriodElapsedCallback'1634 | void...